Lunch box



FIG. 1 is a front, left, and top perspective view of a lunch box, showing my new design;

FIG. 2 is a rear, left, and bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left elevational view thereof;

FIG. 6 is a right elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front, left, and top perspective view thereof, when opened; and,

FIG. 10 is an exploded perspective view thereof, when opened.

The broken lines depict portions of the lunch box that form no part of the claimed design. 

CLAIM The ornamental design for a lunch box, as shown and described. 